The M2 comes with dragontrail glass. Before my M2 I had a HTC HD2 with gorillaglass. This phone has no scratches after 3 years of use without screen protector. However, my M2 already has 2 scratches on the display after 1.5 month of use. So needless to say I believe dragontrail glass is less scratch resistent then gorillaglass. If you own a new M2, I advise to use a screen protector.